Separable fastener



F. S. CARR..

SEPARABLE FASTENEH.. APPLICATION FILED MN. le. 1920.

Pafenteasept. 14511920.

I :wen/bt. Red S. Ua??? UNITED ,STATES PATENT' Orne-n vFRED S. CARR, or NEWT-ON', MASSACHUSETTS, AsSiGNOR To CARR EAST'ENER COMPANY, or CAMBRIDGE, MASSACHUSETTS, A CORPORATION. or MAINE.'

' SEPARABLE EASTENER.

Specification of Letters Patent.

Application filed lJ'aifiuary 16, 1920. Serial No. 351,783.

Newton, in the county of Middlesex and Commonwealth of Massachusetts, have inventedv an Improvement in Separable Fasteners,fof which thefollowing description,

in connection with the accompanying drawings, is a specification, like characters on the drawings representing-,like parts.

This invention pertains ,toA improvements in separable fasteners. Y f Y It is among the ob ects ofthe invention to provide a fastener of simple andy rugged construction rovidinr a considerable de- 1 prevent theV entrance and, disengagementV of .the stud in the usual and desired mannen;

gree of holding power, -especially against forcesy resultant from lateral strain. i In the drawings, which show a preferred embodiment Of'one formV of my invention:

Figure 1 is an elevation of two pieces of fabric secured together by a preferred, form of fastener; Y Fig;V 2 is al section on the line 2-2 of Fig. 1; Y

Fig. 3 is a plan view of twopieces of fabric secured together by a lplurality of such fasteners; y A

Fig. 4 is a front elevation of the preferred form of socket member; andv Fig. 5 is an elevation of the preferred form of spring. y

Referring to the drawings andto the pren ferred form of my vinvention selected for illustrative purposes, I have shown a stud 6 which may be secured to a stud-carrying fabric 7 in any suitable way, but preferably by engagement of the stud base8 within a flanged-over stud-securing part 9, the studsecuring fabric being gripped between the base 8 and the stud-securing part 9.

The preferred form of socket'herein illustrated includes a casing 10 containing a.

spring 11, which is preferably stamped from sheet metal to provide a stud-receiving aperture 12 and providing a slot or opening'l to permit expansion of the spring to receive f the stud. y

The spring 11 is also preferably provided with projections 14 and 15 spaced apart and located opposite the spring opening '13. These projections 14 and 15 abut .against the casing 10 when strain is exerted to bring the stud against the spring ata position midway between these projections, any yieldingv of the spring between these pro. jections tending more firmly to hold together the sides ofthe slot 13l of the spring,

thereby more closely to embrace the stud.

It is obvious that the projections `14 and 15 may beprovided on the casing instead of on 'the spring,l if desired.

y I also preferably provide projections 16 and 17 located onopposite sides of the opening 13 and adapted to space the spring 4,from

4itscasing.v The project-ions 14, 15, 16 and 17 are of such length that they willnot interferewiththe casing in such 7 awaygas to The projections 16 and 17,'l are,` however, preferably proportioned 'so that 'they' will bear against the casing in such a way as` to prevent excessive opening of the spring Patented' sepan, 1920.

when strain isV exerted in such a direction as to bring the stud intov forcible engagement Vwith, that side of thev spring adjacent the notch 18' opposite the `opening 13 of the spring, this-notch preferably having its opening somewhat narrower than the stud so that the points 19 vand 20 will engage the neck of the stud under the lateral strain last described. If desired, rotation of the spring in the socket may be prevented by any suitable way, herein typified by the spring-locating part 21, which maybe struck downwardly from the casing flange.

The preferred form yof socket hereinbefore described maybe secured to its carrying fabric 22 in any suitable way, but preferably by a tubular projection 23'adapted to be deflected outwardly by anvil portions on a socket-securingcap 24 and to engage behind lips 25 on the socket-Securing cap.

It will be understood that I use the word fabric in itsbroader sense to include not only woven materials, but any flexible carrying medium.v r

While I have shown and described a preferred'form of one embodimentV of my inalteration and reversal of parts, and even changes in the mode of operation, may be made Without departing from the scope of my invention, which is best defined in the following claims.

Claims:

1. A separable fastener comprising, in combination, a stud having a head and a neck; a socket including a casing, a flatY spring 1n the casing, said spring having a stud-receiving opening, a split at one side of said opening; and spacing means for spacing the spring from the casing at a point opposite the split in the spring, whereby strain on the spring in a direction away from the split will tend 'to' hold the spring y closed and to increase the lholding power of the spring on the stud. v

2. A separable fastener comprising, in`

combination, a stud having a head and a neck; a socket including a casing, a flat spring in the casing, said spring having a stud-receiving aperture therethrough and having a slit, and a notch communicating with said aperture. l

3. A separable fastener comprising, in

combination, a stud having a 'head andv aY neck; a socket including a casing, a flat sprlng 1n the casing, vsaid spring having a stud-receiving aperture therethrough and Vhaving a slit, and a notch communicating ting' surfaces opposing opening o f the spring when strain is exerted between stud and socket in the direction of saidslit.

5. A socket for separable fasteners comprising, in combination, a casing, a flat spring in the casing, said spring having av 7. A socket for separable fasteners com-v prising, in combination, Va casing, a flat spring in the casing, said spring having a stud-receiving aperture and having a slit at one side thereof, and two projections' between spring and casing, one on either side of and adjacent the slit, and two other'projections between spring and casing, said lother projections spaced apart and located opposite the slit in the spring. y

8. A socket including a casing,r a flat spring in the casing, said spring having a stud-receiving aperture and havin a slit at one side thereof, said springprovlded with a plurality of external bossesto space the body of the springfrom the casing when tioned to permit expansion of the spring vin theV casing to permit the stud to Vbe inserted in and removed from the stud-receiving aperture. l

In testimony whereofI have' signed my name to this specification.

f- FRED s. GARR.

' under lateral str-ain,` said. bosses propor- 

